Gas range



Jan. 7, '1930.5 A. H. BRODBECK.

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A. H. BRODBECK GAS RANGE 5 sheets-sheet 5 Filed Dep. 6. 1927 lllllll I\ www me@ Jan. 7, 1930.

A. H. BRODBECK GAS RANGE Filed Dec. 6. 1927 5 Sheets-Sheet 4 Jan. 7, 1930. A.YH. BRODBCK GAS RANGE Filed Dec. 6. 192'? 5 VSheets-Sheetl 5 Patented Jan. 7, 1930 UNITED STATES .ALMER H. BRODBEC'K, 0F ST. LOUIS,

MISSOURI, ASSIGNOR TO AMERICAN STOVE GOM- PANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY GAS RANGE Application filed December 6, 1927. Serial No. 238,058.

This inventionl relates to improvements'in gas ranges, the particular type of range in which the invention is embodied being what 1s commonly known and referred to as a closed' v 5 top range.

Closed'top ranges have certain advantages over ranges of the open top type, reason there is a demand for this type of range. In a closed top type of range which gets its name from the fact that the top of the range above the burners is solid, it is neces-l sary to make some special provision for the proper movement of secondary air. to the burners and of .the products of combustion away from the burners so as to ensure that a complete and perfect combustion is had, and that no carbon monoxide is formed.

I have discovered that unless products of combustion are readily and properly taken away or carried'off, that a ioating of the burners will result, and particularly will this be the case in respect to the rear burners where the range is two burners deep as is the most Vcommon way of making ranges for domestic use.

It is therefore necessary toprovide a flue space or the equivalent through which to conduct the products ofl combustion from the front burners past the rear burners, and at the same time provide means whereby secondary air will iow freely and rapidly to the rear burners.

Experimentation having taught me the above facts and principles in respect to closed top gas ranges, I have devised and constructed a gas range of the closed top type which is highly efficient in operation, and which is speciically described in the following speclication and claims.

Bearing the above facts in mind, the inven tion has for its objects the following:

The primary'object of the invention is the provision of a gas range of the closed or solid top type having means for ensuring the proper movement of secondary air to the burners and the proper conducting of the products of combustion away from the operating burners so that complete and perfect combustion is had, and there is no formation -of carbon monoxide.

and for this f Another object of the invention is the provision of a closed or solid top gas range in which the ioating of the burners during operation is avoided.

A still further object `of the invention is the provision in a gas range of the type described, of means for carrying the products of combustion from the front burners past therear burners and keeping these products of combustion above the rear burners so that secondary air can readily flow to all the burners and be delivered to them from their under sides.'

A further object of the invention is the provision of a stove of the type described which is highly efficient in operation.

Other further objects, novel features of construction and improved results will appear from the following description and accompanying drawings.

In the drawings:

Figure 1 is a top plan view of the cooking top of a gas range of the closed top type, the rear ends of the cooking top being broken away and shown in horizontal section.

Figure 2 is a vertical sectional view taken on the line 2-2 of Figure 1, looking in the direction indicated by arrows.

Figure 3 is a transverse verticalsectional view taken on the line 3-3 of Figure l, looking in the direction indicated by arrows.

, Figure 4 is a rear view of'an entire range embodying my invention.

Figure 5 is a top plan view of a gas range of the closed top type showing a modified form kof my invention, the rear end of the cooking top being broken away and shown in horizontal section.

Figure 6 is a longitudinal vertical sectional view taken on the line 6-6 of Figure 5, looking in the direction indicated by arrows.

Figure 7 is a transverse vertical sectional View, taken on the line 7 -7 of Figure 5, looking in the direction indicated by arrows.

Figure 8 is a rear viewof a gas range having thereto applied the modified form of my invention. ,A Y

Describing the invention indetail, reference being had to the accompanying Vdrawings, it will be seen that the range proper is designated lby A, while-B indicates v4the'oven y side of the range, C the cookin top side of the range having below the coo ing top the warming oven D.

Referring particularly to Fi `ures 1 to 4 inclusive, indicates the top rame which supports the solid cooking top 11 which top is provided with a plurality of removable covers or lids .12 positioned above the front and rear top or cookin burners.

- The gas supply con uit is indicated at 13 and is supported in front of and below the cookin top by suitable brackets 14. The range ront below the cooking top is open as indicated at 15, and a drip pan 16, supported on a suitable slideway 17 ,forms the bottom of the burner chamber E,Vthe top of which is formed by the solid cooking top 11.

The front burners are indicated at 18 andI the rear burners at 19, these burners being ositioned in the chamber E, and provided with the usual mixing tubes 20, the outer ends 'of which extend through the open`front por tion and are connected to the gas supply pi e-13 through the medium of gas valves 21.- v iihe form of burners illustrated in the drawin s is thatwherein the front or outer ends og thev mixing tubes are supported through their connection with the gas valves which in turn are supported by the main sup- .,ply pipe, while the rear end of the rear urner is'supported by a suitable bracket 22p. Intermediate the lengthof the rear burner mixing tube, the tube is providedwith an outwardly extendinv bracket 23 which supports the rear end of the front burner 18.

The primary air for both front and rear burners is taken in, as is common practice,

through the usual shuttered, bell-shaped ends 24 of the mixin tubes. The secondary air Ventersthe open ront portion 15 of the range and is delivered to the burners from their under sides.

' The range is provided with an outlet flue or stack-25 for carrying off thevproducts of combustion of all or anyof the burner chambers in operation. As clearly appears in Figure 2 of the drawings, the bottom 26 of this outlet flue has an end 27 extending into the burnerchamber E. l

The sub-member or baiiie which comprises the essence of this invention, is designated by the-letter F, and is positioned above the rear burners of the range and below the closed top 11. This sub-member has a vertical front wall 28, side walls 29 which extend rear-A wardly to the rear end of the burner chamber. `The sub-member has a bottom 30 in which are rovided openings 31 of a size or diameter ightly greater than the lsize\ or diameter of the rear burners 19 byreasonV of the fact that the rear end of so as to profvlde a space for the admlsslon or passagethe bottom 30 rests upon and is fastened to the inwardly extending end 27 of the outlet flue bottom 26.

In Figure 2 ot the drawings, the travel of secondary air and the products of combustion is indicated by arrows. Thev plain arrows indicate the travel of the secondary air while the feathered arrows indicate the travel of burners and under the sub-member, reaching the rear burners from their bottom sides through the opening 31.- The products of combustion from the front burners are directed and ke t above the rear burners through the medium of the sub-member, and these products lof vcombustion tr'avel from the rear burners out of the open rear end throu h the said sub-member into) and up-the out et liuc 25. l v

The function-of the sub-member is to pro-L vide a iiue to insure that the products-of combustion yfrom the front burners pass above the rear burners so as not to in any way interfer with the flow of secondary air'to theA or otherwise these products of com ustion of ucts of combustion f .100 'I the front burners have atendency to smother*` the rear burners. v

In Figures 5 to 7, inclusive, an alternate form of the invention is illustrated. The

purpose and operation ofthis alternate forni is practically identical with that described above, although the alternate form di'ers in slightly different details of construction.

By reference to Figures 6 and 7, it will be seen that the sub-member of b'aiiie is designated by the letter G, and that here also the sub-member has side walls 51, bottom 52, and open rear end 53, in. combination with an outlet flue ,54.l In this form of the invention the bottom 5,5 of the outlet ue is shown formed as a continuation of the bottom 52 of the sub-member. The sub-member in this form is supported at its rear end throu The sub-member G v1s, much 'deeper -`than `the sub-member F, its depth` beingsulicient to completely enclose the rear burners 129, and

also that portion of the mixing tubes' imme ldia'tely adjacent the burners.

The bottom 52 ofthe submember is provided with an opening 59v slightly 4greater in diameter thanv thediameter of the bfrners 19, and an upwardly extendingcollar 60 is purpose of this collar is to direct secondary air for use.. v

In Figure 6 of the drawing, the direction of movement of the secondary air is illustrated by plain arrows, and the direction of movement of the products of combustion by feathered arrows. i,

In this form of the invention the rear wall 56 of the range is shown provided with a plurality of openings 6l for the admission of secondary air for usel with the rear burners. Although this form is illustrated, I desire it to be understood that these' rear openings 61 are not essential to the principle of operation of the rear burners. 'In' some instances they are desirable as at certainv times and under certain conditions the front burners generate a heat suiiicient to prevent the admission. of sufficient, secondary air through the open front 15 to take care of the necessary supply of secondary air to the rear burners.

vFrom the foregoing it will be seen that in both forms of the invention there is provided a sub-member or baffle positioned and constructed to direct the products of combustion of the front burners above the rear burners during their passage rearwardly to the outlet flue and that provisionis made in the sub-l members for the admission of secondary air to the rear burners.

It is thought that it will be further readilyl understood that this control of the products of combustion is. necessary and essential in the closed top ty e of range to secure satisfactory and per ect combustion so that no carbon monoxide is formed and to prevent the smothering and ioating of the rear burners during their operation.

Having thus described my invention, what I desire.v to claim and secure by Letters Patent l. A gas range having a closed cooking top with a burner chamber there below, said chamber having an open front end and its rear end in communication with an outlet lue, front and rear burners in said chamber, a sub-member in said chamber, said sub-member surrounding said rear burner and forming a secondary burner chamber above the burner, said secondary burner chamber in communication with the main burner chamber at its top and bottom, and the rear end of said secondary burner chamber in communication with said outlet iue, the products of combustion from the front burners entering said secondary chamber from itsl top and the secondary air for the rear burners entering said supplemental burner chamber from its bottom.

2. A gas'range having a solid top, a burner chamber below said top having an open front end for the admission of secondary air and having'communication at its rear end with an outlet flue for the outlet of the products-of combustion, front and rear burners in said burner chamber, a sub-member of a width substantially the width of the burner chamber and positioned above and surrounding said rear burners, said sub-memberv forming a secondary burner chamber having an open top, open front and an open rear end in communication with said outlet flue, the bottom of said sub-member having openings' for the reception of said rear burners, and sald openings further acting as means for the admission of secondary air to the rear burners during their operation.

3. A gas range having a solid cooking top, a burner chamber lbelow said top having front and rear burners supported therein, said chamber having an opening at its front end for the admission of secondary air for said burners and at its rear end an outlet flue, a sub-'member positioned above said i rear burner and extending to a point in front thereof, said sub-member of a width substantially the width of the burner chambe and having a closed bottom and side walls, said bottom and side walls extending to and supported by the bottom of said outlet flue, said construction forming a secondary burner chamber the rear end of which is in communication with said outletiue, said sub-member having an open top to permit and direct the passage of the products of combustion from the front burner above and past the rear burner to said outlet flue, and an opening in the bottom of said sub-,member for the reception of said rear burner and the admission of secondary air thereto.

4. A gas range having a solid cooking top, a burner chamber below said top having front and rear burners supported therein, an opening at the front end of said chamber for the admission of secondary air for said burners, an outlet flue for the products of combustion, a sub-member forming a housing having an open top and a rear end in communication with said outlet flue, the bottom of said subburner chamber, a sub-member in the rearI end of said burner chamber forming a supplemental burner chamber, a burner in the main burner chamber and a burner having V its top in communication with the su plemental burner chamber, means for the isl45 by said submember, and an outlet ue in comsion o f secondary airvtothe-mainand supplemental burner chambers, andthe burner of the supplemental burner chamber positioned within the secondary air inlet of said 5 chamber, communication between the secondary burner chamber and the main burner 'chamber at the top of said secondary burner chamber for the admission of products of combustion -from the main burner chamber, lo and an outlet Hue for the products of combustion in communication with the secondary burner chamber, for the purpose described. 6. A gas range having a closed cooking top with a burner chamber therebelow, a submember in the rear end of said burner chamf ber and extending rentirely transverse the same, said sub-member forming a sub-chamber having an open top in communication with themain burner chamber, a burner in the main burner chamber infront of said submember, a burner in the sub-chamber formed by said sub-member, and an outlet flue in communication with said sub-chamber, whereby the products of combustion' from the front burner enter the open upper ond of thesub-chamber and pass above the burner therein and escape through said out- 'let flue. l 7. A gas range having a closed cooking top with a burner chamber therebelow, a sub- -member' in the rear end of said burner chamber and extending entirely transverse the same said sub-member having a vertical front lwall thereby forming in the rear end vof theemain. burner chamber a secondary burner chamber, the front wall of said secondary burner chamber stopping short of the cooking top thereb affording communica-A tion with -t e main urner chamber through 40 the open top of said secondary burner chainber, front burners for'said range in said main burner chamber and in front of the vertical wall of said sub-chamber, a burner extendin linto the secondary burner chamber forme munication with said secondary burner member, whereby the products of combustion from the front burners enter the open upper end ofthe secondary burner chamber and 5,0 pass above the burner therein ,and escape through said outlet flue. i In testimony whereof I hereunto aix my I signature.- ALMER BRODBECK.

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